* Math kerning broken in latest beta
@ 2018-04-10 22:53 Henri Menke
2018-04-11 12:00 ` Ulrike Fischer
0 siblings, 1 reply; 4+ messages in thread
From: Henri Menke @ 2018-04-10 22:53 UTC (permalink / raw)
To: mailing list for ConTeXt users
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Dear list,
The math kerning seems to be broken in recent versions of LuaTeX. When I
process the MWE below with TeX Live 2017 (LuaTeX 1.0.4) I get a different result
from the latest beta (LuaTeX 1.07.0). However, I could only observe this
behaviour with some fonts, e.g. stixtwo or lucidaot. No difference was
encountered for modern and xits.
Cheers, Henri
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* Re: Math kerning broken in latest beta
2018-04-10 22:53 Math kerning broken in latest beta Henri Menke
@ 2018-04-11 12:00 ` Ulrike Fischer
2018-04-11 13:26 ` Hans Hagen
0 siblings, 1 reply; 4+ messages in thread
From: Ulrike Fischer @ 2018-04-11 12:00 UTC (permalink / raw)
To: ntg-context
Am Wed, 11 Apr 2018 10:53:58 +1200 schrieb Henri Menke:
> The math kerning seems to be broken in recent versions of LuaTeX. When I
> process the MWE below with TeX Live 2017 (LuaTeX 1.0.4) I get a different result
> from the latest beta (LuaTeX 1.07.0).
We see this in latex too, at looks as if only single atoms are
affected, so adding something to the subscript gives another result:
$\gamma_{e^2} \gamma_{ee} \gamma_{e\hphantom{\strut}} \gamma_{e} $
(I can't test it with context, for some reason it currently don't
find the stix fonts on this pc)
--
Ulrike Fischer
http://www.troubleshooting-tex.de/
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^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Math kerning broken in latest beta
2018-04-11 12:00 ` Ulrike Fischer
@ 2018-04-11 13:26 ` Hans Hagen
2018-04-11 14:27 ` Ulrike Fischer
0 siblings, 1 reply; 4+ messages in thread
From: Hans Hagen @ 2018-04-11 13:26 UTC (permalink / raw)
To: ntg-context
On 4/11/2018 2:00 PM, Ulrike Fischer wrote:
> Am Wed, 11 Apr 2018 10:53:58 +1200 schrieb Henri Menke:
>
>> The math kerning seems to be broken in recent versions of LuaTeX. When I
>> process the MWE below with TeX Live 2017 (LuaTeX 1.0.4) I get a different result
>> from the latest beta (LuaTeX 1.07.0).
>
>
> We see this in latex too, at looks as if only single atoms are
> affected, so adding something to the subscript gives another result:
>
> $\gamma_{e^2} \gamma_{ee} \gamma_{e\hphantom{\strut}} \gamma_{e} $
>
> (I can't test it with context, for some reason it currently don't
> find the stix fonts on this pc)
The usual 'math italic mess' where fonts assume italic correction
instead of proper math kerns.
I'll add a fix for that. We already have \mathscriptcharmode (default 1)
for lists and will have \mathboxcharmode (also defaulting to 1) for
loose chars. We can turn it off in order to investigate issues with real
math kerns (which most fonts seem to lack). Depending on how fonts
develop We might need a font bound flag too.
(In context i might turn these italics into proper math kerns some day.)
Hans
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2018-04-10 22:53 Math kerning broken in latest beta Henri Menke
2018-04-11 12:00 ` Ulrike Fischer
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2018-04-11 14:27 ` Ulrike Fischer
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